vdb_view is a third-party software, which can be found in the libopenvdb-tools package. You can search for detailed usage online.
vdb_view is a command line utility
> vdb_view geometry.vdb
The grid is shown at the start
To see geometry press ‘1’ (toggle tree topology view off) and ‘2’ (toggle surface view on) keys on your keyboard.
Navigate with mouse
Download Blender (free software) from the official website.
Version 3.1 and above can be used.
Open Blender graphical interface.
Select the initial cube with left mouse click.
On the panel on the bottom right, selecttab. Click
In the Modifier settings, fill in
Object : geometry
Grid Name : FillingFrac
Threshold : 0.5
This will plot the isosurface where
FillingFrac grid is filled with scalar values of \(\varphi\), that is, filling fraction.
\(\varphi=1\) in the mesh cells filled with solid or liquid, and \(\varphi=0\) in the empty cells.
Some cells are partially filled. The isosurface where \(\varphi=0.5\) is a good approximation of the metal surface.
Navigate Viewport with [Numpad .], Middle Mouse, Middle Mouse + Shift, Middle Mouse + Ctrl.